Why does my engine need a valve clearance adjustment?
Loss of power could be a sign of a weak or broken valve spring, for example. Checking valve clearance requires removing the valve cover (or two valve covers on V-type engines) and measuring the space between both intake and exhaust valves and their lobes or rocker arms using thin feeler gauges as pictured above.
How do you adjust the valves on an inline 6 engine?
Next, rotate the engine until the #6 cylinder is on TDC, just after it’s compression stroke (one full revolution of the crank shaft). Now adjust the remainder of the valves: Adjust the valves by backing off the adjuster so that the pushrod can be easily rotated between your thumb and forefinger.
Where are the valves on an inline 6-altorfer?
The rockers on cylinder #6, which is the second cylinder from the front on the left side of the engine, should now move slightly when you pull on them. STEP 6: Go back to step 3 and repeat the procedures for measuring, adjusting, and marking the eight valves marked on the drawing above with a black arrow.
How to check the clearance of a valve?
Checking valve clearance requires removing the valve cover (or two valve covers on V-type engines) and measuring the space between both intake and exhaust valves and their lobes or rocker arms using thin feeler gauges as pictured above. (The camshaft must be in the proper position and each valve fully closed for each measurement.)
How many valves do you need to adjust?
There are 12 of them and the next one to adjust is #3 to .006″ (this is an intake valve) then on to #5 .018″ (this is the #3 cylinder exhaust valve,) next is #7 to .006″ (this is the #4 intake valve) then on to #9 set to .018″ (this is the #5 cylinder exhaust valve.) Set down your tools and relax for a moment; you’re halfway through.
When to change valve clearance on small engine?
Through mechanical use and wear, small gas engines require valve adjustment from time to time. If your engine is not starting or running poorly, it could be the valves are not fully opening and closing. To keep your engine running it’s best, valve clearance should be checked and adjusted as part of periodic maintenance.
Do you need to adjust the valve on a GM 6 cylinder engine?
This is a critical, often overlooked part of the tune up of your old GM 6-cylinder engine and it can make a world of difference in how that worn-out engine runs – you may find after doing this adjustment that your old StoveBolt runs so well you decide to ignore the smoking and just run it as is for another 20 years.
How big of a valve should I tighten?
Not one should be tightened all at once; they must be drawn down evenly to prevent damage to anything. Tighten to 25-30 Lb. Ft. then do the valve adjustment again.